Hall of Fame Trainer Evicted From Santa Anita! Will the Breeders Cup be moved? Imagine the outrage if a breakdown such as Ruffian or Barbaro happens then. MisterInside thinks the combination of soil and unusual amounts of moisture are the cause. Additionally, today's animals are bred to have thinner legs (speed rather than endurance). Today's thoroughbreds are more delicate animals than those 50 years ago. Selective breeding exaggerates this and every generation gets faster but weaker. Just my opinion.